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REMOTE INTELLIGENT SENSOR - AREA MONITOR
Instruction 2772-0803 Page 3-7
3.14.3.4 Printed Date Format. A choice of month/
day or day/month format is available:
For the US month/day/year format, set SW2
switches 1 and 2 ‘ON’.
For the European day/month/year format, set
SW2 switches 1 and 2 ‘OFF’.
3.14.3.5 Data Storage Up To 7 Days. In any of
the selected modes, data can be stored for later
printout (up to 7 days of data). This is simply
achieved by unplugging the printer connector at the
RIS printer socket. When a printout is required,
plug in the printer connector, switch the printer on
and then press the PRINT key on the RIS front
panel.
3.14.3.6 Preventing Data Loss.
Data will be lost
if a printer is connected to the RIS but not
Switched on. Under these conditions, the RIS
attempts to ‘dump’ data at the selected interval and
clears the data memory, even though no physical
printout is produced due to the printer being
switched off. To prevent this from occurring,
whenever the printer is not in use, always dis-
connect it, by its connector, at the RIS.
3.14.4 PRINTER CARD DESCRIPTION. In
addition to the switch functions already described,
the printer card provides the following function and
facilities.
3.14.4.1 Real Time Clock. Enables data to be
stored with relevant time and date reference. The
clock is not separately supported and if the system
switch SW1 is turned off it must be reset after the
switch is turned on.
The clock is set by use of the front panel key
switches, using the procedure described in Section
2.8.2.9.
3.14.4.2 Data Storage. Capacity for storing up to
7 day’s worth of data points is provided. The stored
data always contains the most recent record. When
full, the oldest data points are deleted allowing
space for the new data. Once the printer card is
installed, the storage of data takes place automati-
cally.
When the stored data has been printed under
preset timed control, or a PRINT command from
the keyboard, the microprocessor clears the stored
data. The storage can also be cleared at any time by
using the procedure in Section 4.9.
3.14.4.3 Data Communication. The printer
interface card communicates with the microproces-
sor through a data buffer. Connecting a printer to
the printer port completes a circuit that links the
printer present line (PPRS) to ground (0 V).
This makes the microprocessor aware that a
printer is connected. The microprocessor then writes
each data point to memory locations on the board.
Once stored, the data is retained until it is
printed out, or deleted to make way for current data,
or when cleared under keyboard control.
Data is transferred at a higher rate than the
printer is able to print. Flow of data is therefore
controlled by the printer ready line (PRDY) which
changes state to enable, stop, or transfer as required.
3.14.4.4 Selection of Printer Baud Rate. The
Bacharach Printer has a baud rate of 600 bits/sec.
and printer option board has SW3 switches set with
switch # 4 ‘ON’ and the other 3 switches ‘OFF’.
The settings for the complete baud rate selection
are:
BAUD SW # 4 SW # 3 SW # 2 SW # 1
600 ON OFF OFF OFF
1,200 OFF ON OFF OFF
2,400 OFF OFF ON OFF
9,600 OFF OFF OFF ON
3.14.5 CONNECTING A PRINTER. A printer can
be connected permanently, or plugged in when
required. In the latter case, one printer can be used
to support a number of RIS systems.
3.14.5.1 GMD Printer Connection. The GMD
printer is supplied complete with an interconnecting
lead that enables the printer to be plugged into the
standard, pre-wired, socket provided on the left side
of the RIS.
If required, the printer can be permanently
wired to the RIS interface by removing the plug from
the cable and connecting it into the J1 interface in
accordance with the information provided in the
table below.
Printer Cable Connect to J1 Signal
Wire Color Terminal # Identification
Not used 10 PI
WHITE 11 PO
RED 12 PRDY
BLACK 13 PPRS
BLACK 14 0 V
First, turn off the RIS at the system power switch
SW1. Then feed the cable into the RIS through a
convenient cable gland. Carefully tighten the gland
around the cable to preserve enclosure sealing.